If the firearm is unloaded, in a case, and locked in the trunk or toolbox of a pickup, yes, should be legal. There is a Federal law known as Peaceable Journey that covers this. If you do not have a trunk or toolbox, then unloaded, and in a locked case (not the glove box).
It depends on the locality. In some U.S. states, it's perfectly legal to carry a loaded handgun where you can access it in a vehicle, but in some it isn't. You can, generally speaking, transport and unloaded and inaccessible firearm in a vehicle. Check your local laws.
Yes, as long as you legally possess the gun.
Yes, but it must be unloaded during transport.
No state permit is required to possess a rifle, shotgun, or handgun. However, It is unlawful to carry a handgun or any loaded firearm within the limits of any city. It is unlawful to carry a handgun or other firearm concealed on or about one's person or to knowingly transport a handgun in a vehicle. Or . . . It is unlawful to have or carry any rifle, shotgun or any other gun (except a handgun stored properly) in or on a vehicle on a public highway, unless the gun is taken down or totally contained in a securely fastened case, and its barrels and magazines are unloaded.
If you have a carry permit that is valid in Florida, you can carry it anywhere you want. If you don't have a valid permit, the gun must be unloaded and inaccessible. Most people wil tell you it has to be in the trunk, but that is not an actual requirement. It just has to be inaccessible.
shove it up your a**
It depends on what you mean. If you legally possess the handgun, then it is legal to have it in Tennessee. Tennessee doesn't require any kind of registration, however, you do have to have a valid handgun carry permit to legally carry it on your person or have it accessible in your vehicle.
If you can legally possess the shotgun, transport it unloaded, locked in the trunk, and shoot in an area where legal to do so, then yes.
Yes. To be legal, it must be unloaded and inacessible. If you don't have a carry permit, the best place to store it is in the trunk, or if you don't have a trunk, as far to the rear of the car (away from anyone in the car) as you can put it. If you have a carry permit from any state in the U.S. you can carry it loaded and accessible. Tennessee recognizes permits from any state.
is it legal to transport liquid nitrogen
In general, yes, you can transport a handgun anywhere within the U.S. except for a couple of cities, like Chicago, that have restrictions. In your car, the gun must normally be unloaded and inaccessible, and on an airplane, you can transport a handgun in your checked luggage, as long as it isn't loaded and is in a locked gun case.
You can have it unloaded and inaccessible. In order to have it accessible and loaded, you must have a carry permit valid in Alabama.